Ruby on Rails-在单击按钮时从Javascript下拉列表中选择的项目传递给Rails控制器

Question

• I have a button right next to a dropdown

• When a user selects a value from the dropdown and clicks on the button, the value from the dropdown should be passed as a parameter to the Rails controller function

• This is the code that I'm using:

  <%= link_to 'Generate Report', forecast_report_pdf_path(format: :pdf), onclick: "GetSelectedItem('select1')", class: 'btn btn-primary' %>

• how do I pass the value returned by the GetSelectedItem function to my controller? (I already pass format = pdf as a parameter now; but I am not sure how to pass the value returned by GetSelectedItem as well)

Answer 1

I don't if this is the best solution but you could use a form inside the dropdown so you select the option and the value is sent to the controller.

Here you have an example but feel free to adapt it to your code:

<%= form_for :pdf, url: forecast_report_pdf_path(format: :pdf) |form| %>
  <%= select_tag(:person, :city_id, [['Lisbon', 1], ['Madrid', 2], ...]) %>
  <%= form.text_field :name %>
  <%= form.submit 'Generate Report', class: 'btn btn-primary'%>
<% end  %>

Check rails documentation for more details: https://guides.rubyonrails.org/form_helpers.html

Answer 2

 <%= form_tag forecast_report_pdf_path do %>
 <%= select_tag(:report_id, options_for_select([["Summary1", 7], ["Summary2", 6]])) %>
 <%= hidden_field_tag :format, :pdf %>
 <%= submit_tag("Generate Report") %>

I finally got around to writing the above code and it worked!! Thanks much for your inputs @nicolasnisoria !